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MAT 120 Unit 1 Test questions and answers
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MAT 120 Unit 1 Test questions and answers
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MAT 120 Unit 1 Testquestions and answers
Pareto Chat is in order from highest frequency to
lowest frequency (descending bar heights)
Explain the difference between a typical bar graph
and a Pareto chart.
Sample
A subgroup of the entire group of interest is called
a(n)
parameter
numerical summary calculated based on data from
all individuals in the group of interest.
bias
A _____ occurs when out results are not
representative of reality. This may be due to poor
sampling procedures, low response rates,
problems with the survey or interview questions,
faulty analysis, or just plain bad luck.
resistant
we say that a statistic is _____ if the presence of
extreme observations in our data do not
substantially impact its calculated value.
random
sampling gives us our best chance for a sample
that is representative of our entire group of
interest. In this type of sampling, probability is
,involved in determining which individuals are
selected for the sample.
probability
The likelihood or chance that an event occurs is
called its
obervational
In a(n) _______ study, the explanatory variable is not
manipulated; researchers simply collect data.
z-score
By calculating a(n) _______, we can determine the
relative position of an observation. This calculation
tells us how many standard deviations above or
below the mean our observation lies.
True
True or False; A bar graph is a satisfactory method
of presenting qualitative data
False
It is always possible - and ethical - to apply an
experimental study design when investigating the
relationship between two variables.
Skewed data w/ outliers:
need to use median and IQR or 5-number summary
Kelsey is studying the lifespan of a certain species
of sea turtle. Many of these turtles perish shortly
after hatching, but in general, they live a very long
life. Unsurprisingly, Kelsey's data show a
considerable number of extremely low
, observations compared to the rest of the data. She
presents her data to a committee, using the mean
and standard deviation as her chosen measures of
center and dispersion. What mistake has she
made? How could she correct it?
Ratiio
The speed (in MPH) of a specific current in the
Atlantic Ocean
Nominal
The species of jelly fish that stung your arm.
Interval
The temperature (in F) of the water at Isle of Palms
right now
Ordinal
The severity category for a hurricane in the gulf of
Mexico
Qualitative
characteristics
Quantitative
measured; numerical
discrete
The number of named tropical systems in the
Atlantic this year
continuous
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